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Nuetrik [128]
3 years ago
9

Find the area of the figure. Assume the figure is made up of triangles.

Mathematics
1 answer:
grigory [225]3 years ago
5 0


S = 2*(1/2 * 7 * 14) + 2* (1/2 * 7 * 7) = 7*14 + 7*7 = 7*(14+7) = 7*21 = 147 sm^2

Number B

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How do you find the area of a triangle when given only the lengths of three sides?
SashulF [63]

Answer:

Use Heron's formula; see below.

Step-by-step explanation:

Use Heron's formula.

Let the sides of the triangle have lengths a, b, and c.

s = \dfrac{a + b + c}{2}

area = \sqrt{s(s - a)(s - b)(s - c)}

Example:

A triangle has side lengths 3, 4, and 5 units.

Find the area of the triangle.

s = \dfrac{a + b + c}{2}

s = \dfrac{3 + 4 + 5}{2}

s = 6

area = \sqrt{s(s - a)(s - b)(s - c)}

area = \sqrt{6(6 - 3)(6 - 4)(6 - 5)}

area = \sqrt{6(3)(2)(1)}

area = \sqrt{36}

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2 years ago
What is the sum of the measures of the measures of the exterior angles of this triangle?
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Answer:

The sum of the exterior angles is 360 degrees.

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3 years ago
Solve for y.<br> 5(y+5)=-7(2y-1) + 7y
scZoUnD [109]

Answer: y=1.5

Step-by-step explanation: Isolate the variable by dividing each side by factors that don’t contain the variable.

4 0
3 years ago
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Alex787 [66]

Answer:

The answer is D

Step-by-step explanation:

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mixas84 [53]

Answer:

a) 1/7 liters of petrol is used for each mile

Step-by-step explanation:

Justin fills his car with 40 litres of petrol. After travelling 35 miles it's down to 35 litres.

From the above statement:.

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Cross Multiply

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3 years ago
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